Lubricant tips for use in INA plain bearings

Proper installation and maintenance is an important factor in the longest service life of INA bearings. At the same time, attention must be paid to the cleanliness of the bearings, the correctness of the choice of bearings and the selection of appropriate installation and maintenance tools. In addition, the plain bearings must be protected from contamination and moisture and ensure proper installation and lubrication. Therefore, the design of the bearing arrangement, the condition of the oil seal, the type of lubricant and the lubrication cycle, and even the special maintenance play the same and important role.

4, mixed grease

Never mix incompatible greases. If two incompatible greases are mixed, the consistency will usually be soft. In the end, the sliding bearings may be damaged due to the easy loss of grease. If you don't know which grease is used in the INA bearing, you must completely remove the old grease inside and outside the bearing before adding new grease.

There are usually the following basic requirements for lubricants:

(1) It has sufficient lubricating effect, which can reduce the friction of the bearing and inhibit the harmful wear process in the bearing. The frictional resistance is small and the anti-wear ability is large.

(2) Preventing corrosion of the bearing, which itself does not cause corrosion, deterioration or deformation of components of the sliding bearing (such as copper cages, rubber seals, etc.).

(3) It is possible to maintain the necessary lubricating performance within the range of the upper and lower limits of the specified operating temperature, and the chemical composition is stable and the viscosity does not change much.

(4) A sufficiently thick oil film can be established within the range of the upper and lower limits of the specified working speed; it is clean, free of impurities, and has good defoaming properties.

(5) Physical properties and chemical properties are stable enough during the required working period or during the inventory period, so as not to affect the quality of the use.

(6) Maintenance and maintenance are simple and the attachments are as small as possible.

(7) Under the premise of meeting the above technical requirements, economically strive to save.

2. Additional requirements for lubricants

(1) has a good cooling effect.

(2) It has strong adhesion to the surface to be lubricated, and leakage, dripping or scattering is as small as possible; water separation is good.

(3) Mixing a small amount of impurities (such as moisture) does not affect its performance.

(4) It acts as a seal to prevent water or dirt from entering the bearing.

(5) It is not easy to transmit vibration or reduce noise.

(6) Centralized lubrication can be implemented.

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INA roller bearings are maintenance inspection standards

In order to fully utilize INA bearings and maintain their proper performance for a long time, regular maintenance (regular inspection) must be performed. Through proper periodic inspections, early detection of failures and prevention of accidents are important to improve productivity and economy.

Key factors affecting the life of a roller bearing For many rotating machinery products, their service life depends on the life of the bearing components at critical parts of the product. "Maintenance-free" bearings are not one-way bearings that will never be damaged or failed but will not be damaged within a certain period of time. Here the designers calculate the service life of the bearing. The bearing life of the INA bearing is greater than or equal to the overhaul period of the mechanical product. The bearing can be “maintenance free”. When the mechanical product is overhauled, the new bearing can be replaced without using the used bearing. Carry out maintenance.

1, cleaning

When the INA bearing is removed for inspection, the appearance record is first recorded by photography. Also, verify the amount of lubricant remaining and sample the lubricant before cleaning the bearings.

a. The cleaning of the bearing is carried out by rough washing and fine washing, and a metal mesh frame can be placed on the bottom of the used container.

b. When rough washing, remove the grease or adhesive with a brush or the like in the oil. At this time, if the bearing is rotated in the oil, be careful that the rolling surface will be damaged by foreign matter or the like.

c. When washing finely, slowly rotate the bearing in the oil and carry out it carefully.

The cleaning agent generally used is a neutral non-aqueous diesel oil or kerosene, and a warm alkali liquid or the like is sometimes used as needed. Regardless of which cleaning agent is used, it is often filtered and kept clean.

Immediately after cleaning, apply anti-rust oil or anti-rust grease to the roller bearings.

2, inspection and judgment

In order to judge whether the removed bearing can be reused, it is important to check its dimensional accuracy, rotation accuracy, internal clearance, mating surface, raceway surface, cage and seal.

Regarding the inspection result, it can be judged by a person who is using a conventional bearing or a proficient bearing.

The criteria for judgment vary depending on mechanical properties and importance, inspection period, and the like. Roller bearings must not be reused if they are damaged and must be replaced.

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